Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp31b..05s&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SP31B-05
Physics
2162 Solar Cycle Variations (7536), 7536 Solar Activity Cycle (2162)
Scientific paper
In this work is studied a signal near 158 days in sunspots areas direcly linked with the emergence of magnetic flux, from historical records between solar cycles 17 to 23, by means of wavelet analysis. Is showed that this periodicity present excitation of subharmonics in certain time intervals, and I found support that the lifetime of larger complex of new sunspots created is the cause of these signature. The result can be important for improve the knowledge of the subphotosferic phenomenon related to the conversion of magnetic toroidal field in poloidal ones. In adition, the wavelet analysis shown evidence of this signal in the geomagnetic storm sudden commencements SSC and in the geomagnetic aa index, synchronically with events de solar flux emergence. Since the SSC are a powerfull mechanism of energy injection in the upper ionosphere that affect several climate variables, it is discussed the relevance of results presented for climate changes.
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